draper



(No Model.)

' E. S. DRAPER.

SUPPORT FOR SPINNING SPINDLES.

No. 447,400. vPatented Mar. 3,1891.

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EBEN S. DRAPER, or HOPEDALE, MASSACHUSETTS, ASSIGNOR To GEORGE DRAPER & SONS,

OF SAME PLACE.

SUPPORT FOR SPINNING-SPINDLES.

SPECIFICATIONfoz-ming part or Letters Patent No. 447,400, dated March 3, 1891.

Serial No. 308,281. (No model.)

To all whom it may concern:

Be it known that I, EBEN S. DRAPER, of Ilopedale, county of W'orcester, State of Mas sachusetts, have invented an Improvementin Supports for Spinning-Spindles, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object to improve that class of spindle-supports wherein the bolster is made vertically adjustable with relation to the step, in order that the tapering inner surface of the bolster may be kept in proper contact with the tapering surface of the spindle and the amount of looseness between the bolster and spindle be regulated. Prior to this invention, as in United States Patent No. 378,877, this adjustment has been accomplished by connecting the lower end of the bolster with the upper end of the step by a screw-thread. In the patent referred to the thread at the lower end of the bolster is an internal thread, and the thread upon the up- 2 5 per end of the step is an external thread, and as a result of such construction the thread is necessarily fine and of less depth than were,

0 move as required by the spindle as the latter seeks its true center of rotation, the movement of the bolster when the lower end of the latter enters a hole in the step loosely rat-her than fitting over a projection being freer than when the lower end of the bolster surrounds a projection, as in the patent referred to. Further, when the bolster is threaded externally to enter the step, as herein provided for, the connection between the bolster and step is more durable because of the coarse threads than in the old plan represented in the patent referred to.

Figure 1, in partial elevation and section, shows a spindle and support for it embodying my invention; Fig. 2, a section below the dotted line :r; Fig. 3, a section in the dotted line 00, and Fig. 4 an elevation of the bolster.

The rail A, the supporting-case B, secured to it by the nut B, and the spindle 0, having, as shown, a sleeve-whirl O and tapered from at or near the plane of the band-pull to its lower end, are and may be all as usual.

The chief purpose of the bolster a is to constitute a smooth hard-surfaced but yielding lateral bearing, against which the tapering exterior of the pintle of the spindle may run and bear uniformly.

In practice it has been found of the greatest advantage to mount the bolster loosely in a supporting-case and to enable the bolster to 1 have greater looseness or freedom of motion than in the construction represented in the said patent, and also to increase the strength and durability of the parts I have provided the lower end of the bolster with an external screw-thread and have tapped a hole into the step, and I have so cut the said screw-thread that the connection is very loose, yet the threads are so thoroughly cut and defined as to enable the bolster to be adjusted accurately to the tapering surface of the Spindle by retating the bolster. When the lower end of the bolster surrounds an extension of the step, the bolster is prevented from tipping freely; but by threading the lower end of the 8 5 bolster externally and screwing it loosely into the step the bolster may tip freely on or with relation to the step to the extent of the looseness of the screw-threads, and the foot of the spindle may move laterally on the step below 0 the bolster sufficient to very materially decrease any tendency to jar.

I have shown the bolster as provided with a projection a to enter a notch a. in the sup port 13, and the step as notched at b to receive a projection 12 such notches and projections restraining the rotation of the bolster and step with the spindle.

Both the bolster and Step should preferably be loosely fitted in the supporting-case, 10o

though either may be fitted closely Without departing from my invention.

I believe myself to be the first to enter a bolster into a step for the purpose of reducingjar when either member is loosely held, and consider this structure advantageous even if the screw-threads are omitted.

I am aware that in the patent referred to the screw-threads connecting the bolster with the step may be such as to leave considerable play between the threads; but with such construction the thread being at the interior of the bolster and at the exterior of the step, rather than at the exterior of the bolster and at the interior of the step, as herein provided for, makes such a fine thread, owing to the small diameter of the circle in which the thread falls, that the looseness is insuflicient to provide for the necessary movement of the bolster.

I claim.

1. A spindle case or support and a spindle having a tapering pintle, combined with a bolster tapered internally to fit the spindle and threaded externally at its lower end, and with an independent step threaded in tern ally and into which the lower end of the bolster is screwed loosely, substantially as described.

2. The combination, with a supporting case or holder and a step recessed at its upper end, as described, of an independent bolster, the lower end of which is inserted in the step loosely to permit lateral movement of the bolster in or with relation to the step, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EBEN S. DRAPER.

Witnesses:

E. D. BANcRoFT, A. V. BEARDSELL. 

